Gas circuit control system of pneumatic cardiopulmonary resuscitation pressing device

A gas circuit control system of a pneumatic cardiopulmonary resuscitation pressing device, comprising:

• a gas control valve communicating with a piston cylinder of the pneumatic cardiopulmonary resuscitation pressing device,
• wherein a spool of the gas control valve controls gas charging and discharging of the piston cylinder when reciprocating, at least one end of the spool of the gas control valve is provided with a gas cavity, the gas cavity communicates with a gas source through a miniature electronic control valve, and the miniature electronic control valve controls gas charging and discharging of the gas cavity to drive the spool of the gas control valve to reciprocate,
• wherein the gas control valve is a single-way double-port gas control valve, two ends of the spool of the gas control valve are respectively provided with a first gas cavity and a second gas cavity, and a body of the gas control valve is provided with a gas control valve gas inlet, a gas control valve gas outlet and a gas control valve gas supply port:
• the gas control valve gas inlet communicates with the gas source, the gas control valve gas outlet communicates with an atmosphere, and the gas control valve gas supply port communicates with a gas circuit interface of the piston cylinder:
• the gas control valve gas supply port communicates with the gas control valve gas inlet or the gas control valve gas outlet when the spool of the gas control valve reciprocates;
• and the miniature electronic control valve is provided with two electronic control valve gas supply ports which respectively communicate with the first gas cavity and the second gas cavity, and the first gas cavity and the second gas cavity are subjected to gas charging and discharging alternately when a spool of the miniature electronic control valve reciprocates, so as to push the spool of the gas control valve to reciprocate.